A-LevelPhysicsWaves9702/12 · Oct/Nov 2016 · Q291 Mark
A microwave transmitter is placed at a fixed distance from a flat reflecting surface, as shown. [Figure 29.1] A microwave detector is moved steadily in a straight line from X to Y. A series of maxima and minima of intensity is obtained. The distance between adjacent maxima is 1.5 cm. What is the frequency of the microwave radiation?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A1.0 × 10⁸ Hz
B2.0 × 10⁸ Hz
C1.0 × 10¹⁰ Hz
D2.0 × 10¹⁰ Hz
✓ Correct answer
C: 1.0 × 10¹⁰ Hz
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